How can I use the set-guid bit vulnerability to execute a file /bin/grade which is owned by root using the following 3 vulnerable programs? I am not root nor part of the bsp* groups so my access to the programs is limited to read & execute only. For the file /bin/grade, I only have read access, but I want…
Tag: c++
Run matlab compiled dll library from a C program on Linux/OSX
So I have a .dll file that was built via Matlab on Windows and I would like to run it on a C/C++ program I’ve created. Is that possible at all? I know I can run it on windows like this: But windows.h is not available on Linux/OSX, is there any other way? Alternatively is there any other format I
What does the output of this program means?
I am trying to get the maximum virtual memory of the current process in Linux. And I am using getrlimit() I get -1 in both values. Shouldn’t I expect the virtual memory max allowed for the current process ? Answer The value RLIM_INFINITY denotes no limit on a resource (both in the structure returned by …
linux – serial port programming ( ASCII to Byte )
I tried to receive data from serial port. However, those data is unrecognized to me. The root cause is because those are in ASCII. To decode the data, it needs to be the byte formate. The buffer I’ve created is unsigned char [255] and I try to print out the data by using Two questions here: The data mig…
How to get the returned stdout of a program called with QProcess?
I am writing a program in Qt and currently using popen to run a linux command and read the output into a string: So I’d like to throw the above code away as I’d prefer to use higher level facilities provided by Qt if possible. Does anyone have an example of how to do this with QProcess or atleast …
Segmentation fault with ucontext makecontext on OS X 10.10
I run my code in OS X 10.10 with gcc. I am trying to implement a usercontext library. If I comment out thread_create( &t2, thr2, NULL);, the code will produce desired effect. I have no idea why a line related to t2 will lead to segmentation fault of t1. Author’s Notes I happily work on implementing …
Detect if a remote computer is Windows or Linux OS
I have IP Address and Server name of a remote computer. I am able to query WMI to get the OS version if the computer is running Windows but is there a way i can query the remote computer and get the OS version if the computer is not running Windows (Linux, Solaris)? Answer I guess Active Directory is going
When using the GCC driver, what makes a static lib “incompatible”?
So what I am trying to do is on Ubuntu 14.04 (x86_64) I want to set up musl-libc based on the latest released 1.1.11 version which is available at this moment. What I did was to: Install multilib support for GCC: sudo apt-get –no-install-recommends install gcc-multilib Configure the libraries for 32-bit…
Any equivalent function to pthread_getcpuclockid since i have tid of Thread
To get perf statistics of parallel running threads – To get list of threads I use thread list in /proc/self/task Now I want to get ID of a thread’s CPU time clock. But clock_getcpuclockid only works with PIDs. pthread_getcpuclockid requires the pthread id of thread and I did not find any way to ge…
fgets return less characters
I’m writing an assembly program for practice. The assembly program uses the c library functions. I’m concern in particular with fgets() function. The fgets manual page states: I have declared a buffer of 1024 bytes and used it in the fgets funtion to read text from a file. But the program is retur…